MCMedicalCodingSoftware
Y04.0

Y04.0: Assault by unarmed brawl or fight

Non-billable headerICD-10-CM

Y04.0 is a non-billable header ICD-10-CM code for assault by unarmed brawl or fight. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category Y04

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1 inherited from the categories above Y04.0

A category’s note binds every code beneath it.

Written on Y04: Assault by bodily force

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Brawl(hand) (fists) (foot)
  • Manhandling(in brawl, fight)
  • Assault›brawl(hand) (fists) (foot) (unarmed)
  • Assault›fight(hand) (fists) (foot) (unarmed)
  • Twisted by person›assault
  • Twisted by person›homicide(attempt)
  • Twisted by person›with intent to injure or kill
  • Assault›bodily force›unarmed fight
  • Injury, injured NOS›due to, in›fight
  • Kicked by›person›assault
  • Kicked by›person›homicide(attempt)
  • Kicked by›person›with intent to injure or kill

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Y04.0

3 child codes. Green means billable.

Other codes under Y04

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.